Kemppi Pro Evolution 3200 - Manual (Page 10)

10 – Kemppi pro evolution 300, 400, 500, 300 mvu, 400 mvu, 500 mvu / 0617 © Kemppi oy
9
-9
0
I
2
t
U
2
max.
I
2
4.1.2. Control of ignition pulse current (PX)
Display 0 corresponds to factory set up of ignition pulse. Number of ignition pulsesd epends on
electrode type and diameter which are used. Ignition pulse changes with set value of welding
current in such a way that at low values ignition pulse is low and short and at high values it is
higher and longer.
Low, short ignition pulse. Object e.g. small stainless electrodes.
4.1.3. Meter display (PL, PX)
Voltage meter shows machine’s terminal voltage which is voltage between connectors X11/X12
and X13.
Accurancy of current true value in respect to real value is ±2,5 %, ±2 A.
Accurancy of voltage true value in respect to real value is ±2,5 %, ±0,2 V.
Depending on welding cable legth and copper cross section, real arc voltage and meter display
might differ main volts from each other. Error will incease when current is growing. See table in
paragraph ”Welding and earth cables”, page 8.
In current measurement the same error won’t appear.
4.1.4. Operation mede selection (PX)
Normal MMA welding
In normal MMA welding there are constant current characteristics in the machine. The machine
is trying to keep welding current value regardless of arc length changes.
0 = factory set up
Factory set up. Object e.g. basic electrodes.
High, long ignition pulse. Object e.g. high efficiency electrodes.
U
2
=20V+0,04xI
2
norm line
statically constant current